diff --git a/lib/liquid/tokenizer.rb b/lib/liquid/tokenizer.rb
index ec3a2d94..b5146ed3 100644
--- a/lib/liquid/tokenizer.rb
+++ b/lib/liquid/tokenizer.rb
@@ -85,7 +85,7 @@ module Liquid
       if @for_liquid_tag
         @tokens = @source.split("\n")
       else
-        @ss = StringScanner.new(source)
+        @ss = StringScanner.new(@source)
         @tokens << shift_normal until @ss.eos?
       end